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Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions

This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir,...

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Detalles Bibliográficos
Autor principal: Kyzas, George Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449042/
http://dx.doi.org/10.3390/ma5101826
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author Kyzas, George Z.
author_facet Kyzas, George Z.
author_sort Kyzas, George Z.
collection PubMed
description This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir, Freundlich and Langmuir-Freundlich model (L-F). The maximum adsorption capacity of the coffee residues can reach 70 mg/g for the removal of Cu(II) and 45 mg/g for Cr(VI). The kinetic data were fitted to pseudo-first, -second and -third order equations. The equilibrium was achieved in 120 min. Also, the effect of pH on adsorption and desorption was studied, as well as the influence of agitation rate. Ten cycles of adsorption-desorption were carried out revealing the strong reuse potential of these low-cost adsorbents; the latter was confirmed from a brief economic approach.
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spelling pubmed-54490422017-07-28 Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions Kyzas, George Z. Materials (Basel) Article This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir, Freundlich and Langmuir-Freundlich model (L-F). The maximum adsorption capacity of the coffee residues can reach 70 mg/g for the removal of Cu(II) and 45 mg/g for Cr(VI). The kinetic data were fitted to pseudo-first, -second and -third order equations. The equilibrium was achieved in 120 min. Also, the effect of pH on adsorption and desorption was studied, as well as the influence of agitation rate. Ten cycles of adsorption-desorption were carried out revealing the strong reuse potential of these low-cost adsorbents; the latter was confirmed from a brief economic approach. MDPI 2012-10-10 /pmc/articles/PMC5449042/ http://dx.doi.org/10.3390/ma5101826 Text en © 2012 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Kyzas, George Z.
Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title_full Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title_fullStr Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title_full_unstemmed Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title_short Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions
title_sort commercial coffee wastes as materials for adsorption of heavy metals from aqueous solutions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5449042/
http://dx.doi.org/10.3390/ma5101826
work_keys_str_mv AT kyzasgeorgez commercialcoffeewastesasmaterialsforadsorptionofheavymetalsfromaqueoussolutions